Brake mechanism for shock absorbing cars



July 2, 1935. w P, KELLETT 2,006,772

BRAKE MECHANISM FOR SHOCK ABSORBING CARS Filed March 9, 1954 2 Sheets-Sheet l July 2, 1935. w. P. KELLETT BRAKE MECHANISM FOR SHOCK ABSORBING CARS d March '9, 193 2 Sheets-Sheet 2 File Patented July 2, 1935 a I William Platts Kellett, New as], g g p I Application March' 9, 1934, Serial No. 714,771 13 Claims. (015105-3925) In the development of railway transportation of the hand'wheel mechanism disclosedin Figequipment it has been proposed to provide 'a ure 3. I I I UNITED STATES PA EN FF- super structure movable longitudinally in rela- Figure 5 is an e arged partsetion and elevaa tion to the chassis of the car, such moveme'nt tional detail'showing a slightly modified, form of 5 being restricted to certain limitations. An exhand. wheel mechanism. =5

ample of such equipment may be found in United In the device herein shown the structure illus- States Patent 1,940,953 dated December 26, 1933 trat d, pa u y in Figure h ws a ne for Shock absorbing car structures. I tudinally movable platform or super-structure I It has been found extremely desirable, if not S pp d by rollers 2 p am blocks 3 mounted 1o imperative, that the hand control of the brake n he m in frame 4 of the chassis. This main 1 equipment of such cars should be mounted o frame or chassis of the car is provided with the the movable platform as the installation of such usual braking q p the only portion hand-control on the chassis is extremely dan'ger- W c b i herein wn is e brake Cy d one; through the movement of the super struc- W h' t p 'l 5 Which IcOnneCtS with ture, I operates'the brake lever, which in turn is con- -5 The principal objects f this inv ntion r to nected with the brake beam in'the manner which provide a, car equipment of the shifting platform is well known and (108$ not require illustration. type with a brake control device mounted onthe The platf rm I s capa l o d al v movable platform and connected with the brak ment in either direction supported on the'rollers mechanism of the chassis in such amanner as to i s limit of mOVemeht being Suitably 00hr '9 permit perfect freedom of movement of the plattrolled,ithe details of such structure being fully form or super-structure while maintaining a illustrated in United States Patent 1,940,953; constant condition of operative efficiency bethough it must be understoodthatthe, present tween the movable control mechanism and the invention is not limited to being used with this 2 braking equipment of the car mounted on the structure only. I

chassis. The main frame of the car is provided with The principal feature of the invention consists an end sill I and a cross beam 8 is spaced therein the novel arrangement of the hand wheel from, said end sill and cross beam being conbi'ake shaft and co-operating mechanisms onthe nected by a plate 9 which is provided with a. shifting platform or super-structure of the car lon it dinal slot ll). W connected through a flexible element vertically t the end of'the longitudinally movable platd p w h op ting brake lever mounted form I the top plate II is cut away to form a on the chassis, the flexible vertical element being rectangular shaped recess l2, and in this recess free to swing to follow the relative longitudinal igarrapgeq a plate l3 formed with an upwardly 55' movement of the super-structure without mateoffset flange M which overlaps the edge of the 5 rially' affecting the relation between the hand recess l2. p j I wheel mechanism and the brake lever, that-is to A bottom plate I5 is spaced below the offset say, the super-structure may oscillate longitudi end plate, being rigidly secured thereto by. a nally upon the chassis without changing the relazbarl5 at the front end, and at its inner ,end tion between the brake lever and the brakeit is supported by the cross Z-bar H, the latter applying hand Wheel, whether the brakes are set beingprovided with an opening l8 therethrough. or free. I 1 r A plate l9is secured to the top of the plate In the accompanying drawings, Figurel is a (3 and is provided with a journal orifice ZD arbroken plan view of a portion of the deck of .a ranged in alignment with the hole 2 Lin the plate 4' car illustrating the location of the brake cylinder, l3. 'Journ'alled in the orifice 20 is a sleeve mem- 4-5 the hand wheel and the means connecting same. ber 22, the lower end 23 of which is journalled Figure 2 is a broken diagrammatic part, secin an orifice 24 in the bottom plate l5. tional elevation of the portion of the car shown A ratchet wheel 25 is formed 'ntegral with or in Figure 1 and illustrating the relative arrangesuitably secured to the upper portion of the ment of the hand wheel brake cylinder and intersleeve 22 above the plate l9. This ratchet wheel 50 connecting parts. is engaged by a pawl 26 mounted on a bolt 21. Figure 3 is an enlarged plan view of the portion A ep plate 5 Secured t0 the p of h of the movable super-structure of the car carryofisetflange M of the plate l3, extendspver the ing the brake wheel. ratchet wheelyand prevents its displacement.

Figure 4 is an enlarged vertical sectional detail The sleeve 22 is formed with a rectangular 55 orifice therethrough, in which is slidably mounted the squared brake shaft 30, upon the upper end of which is mounted the hand wheel The sleeve i2 is provided with a spur pinion 32 which meshes with a spur gear 33, the-hub 3'4 of which is'journalled in'anprifice inthe bottom plate I5. A short shaft 35 isrigidly secured to the gear 33 and extends upwardly.therefrom, the

upper end thereof having a bearingsupport in the apex of a V-shaped notchjlj cutyin the top plate H of the platform I, and which also extends, to a bearing recess in the offset flange M of the- 1 plate l 3 and is secured by the keeper plate".

' a A length of chain'3l issecured to the winding vwith the end of the chain31;

shaft 35 and extends ahorizontal direction t ro h he. pe inthe ross i-b r ll;

' A horizontal rod 38slidably arranged in holes inth'e cross bars 39 of the platform, is connected A grooved-roller 40 .mountedin-a bracket 4| onthe-undersideof the platform I adjacent'to theinner end of the rod'38, supportsa length of chain connected- -to the, innerend of the rod 38. This chain extends verticallygdownward into the car chassisand engages agroovedroller 43 mounted in a suitable bracket support'in the chassis in such. a position that the. chain passing a right angularly therearound, extends in a horizontal directionand is connected to'the brake lever operatingplunger 6. i v a It will be noted that the platform lmay oscillate longitudinally on its roller supports'as is diagrammatically illustrated in Figure 2 of the drawings without any material difference being made in the length of the chain connection between the brake lever and thebrake wheel mechanism, and it will be particularly noted that as the platform oscillatesupon the cam block its endwise movement is coincident'with a slight downward movement. The co-ordination of these movements and the length of=the chain connection maintains a stabilized condition in the length'of theconnection betweenthe hand wheel brake mechanism and the brake lever. 3

' The operation of the device is extremely simple. The turning of the hand wheel, the 'shai't of which is square, rotates the-sleeve 22, turning the spur pinion 32 and operating the spur gear 33- which meshes therewith. This rotates the chain shaft 35, winding'upthe chain which pulls on the rod 38 and the chain 42 to operate the brake mechanism, and becauseof the compenchain extending between the rollers 40' and 43, the operation of the brakes will be constant; that ,is' to say, unafiectedbyrelative change of" position. It will be understood that changes in thedetails :01 construction of the means for operating the chain winding shaft maybe made without altering' the principal feature'of this invention.

' Figure 5 illustrates a modification of the inven-' tion in which the {sleeve member surrounding a the brake wheel shaft, instead 1 01 'carryinga spur it ma g s; Wei-5 Whe l; ZS'EE QHeF L -pinion, is provided with a thread o wqrm 45.

This shaft is slidable in the sleeve verti- 7 horizontally arranged shaft 41 upon which the chain 31 is wound.

Many ofthe details of the structures herein applying mechanism on the chassis through a vertical flexible connection whichjwill permit freedom of movement between 'th'e'chassis and platform. 1

What I claim as my invention is:-

1.In a car having a brake equipped'chassis V and a relatively moveable. superstructure, auxiliary brake operating mechanism for applyingethe brakes on said chassis and mounted solely on said superstructure, and a; flexible operating connection connected at one end with the chassis brake mechanism and at the other end with said auxilmovable super-structure; v 72.. Means as claimed in'clairn 1 in which said flexible operating connection is arranged in part in a normally neutral vertical position between the chassis and movable superstructure for'displacement to either side of said normal position on relative longitudinal movement of thecar and chassis. I

3. In a car having a brake equipped chassis and a relatively moveable superstructure, auxiliary brake-operating. mechanism for applying the brakes on .said chassis and mounted solely on said superstructure, means connecting the brake mechanism of the chassis with said auxiliary brakeoperating mechanism of I the superstructure including horizontally and vertically arranged portions, the vertical portion forming a positive connection but being capable. of oscillation to permit the relative movement between said chassis and said superstructure; a

a 4. In acar havinga brake equipped chassis J and a relatively moveable superstructure, a hand wheel brake applying mechanism including a gear reduction unit I mounted; on said superstructure and moving therewith; and means connected with" aidgear reduction unit provide with, a down wardly extending flexible portion/operatively con;

nected with the brake mechanism of the chassis; said flexible portion permitting a the free move ment of the superstructure on the chassis with out objectionably affecting the braking relation between'the brakemechanism of the chassis and the hand wheel gear reduction unit of the super structure.v 5. In a car having a brake equipped'chassis anda relatively moveable superstructure, a hand wheel mechanism mounted on said superstructure and free from contact with said -chassis,' a horizontal membercarried by said superstructure and operatively connected with'said hand wheel mechanism, and a downwardly extending 'memherflexibly connected with said horizontal memoperating mechanism of the chassis. a

6, A'device as claimed in claim' lin'which a hand wheelisfjournalled in the moveablesuperstructure, a winding shaftis operatively con-i berandoperatively connected with "the brake nected with said hand/wheel, a chain iscon nected with saidwindingshai't, a horizontal rod 7 connected with said'chain is slidably mounted in said superstructure, a chain is connected with the other end of said slidable rod and extends. horizontally therefrom and downwardly, a guide. is

provided on the chassis around which said chain extends and said chain is operatively connected with the brake mechanism of the chassis.

7. In a device as claimed in claim 1, a sleeve rotatably mounted vertically at one end of said superstructure, a hand wheel having its shaft mounted in said sleeve, a winding shaft journalled adjacent to and operatively connected with said sleeve, a brake operating member secured to said winding shaft to be wound therearound, a roller mounted on the superstructure, said brake operating member having a flexible portion extending over and downward from said said roller, and a roller mounted on the chassis around which said flexible portion of the brake operating member extends and which is connected to the braking mechanism of the chassis.

8. In a brake mechanism for shock absorbing cars the combination with a chassis having a brake mechanism thereon, a superstructure mounted for longitudinal movement on said chassis and presenting a platform closely overlying the chassis, means connected with said brake mechanism extending vertically upward from intermediate the depth of the chassis and terminating substantially in the horizontal plane of said closely overlying platform and being free to oscillate with the movement of the superstructure and adapted to be operated from the upper end to effect the application of the brake, and means mounted on said platform and connected with said oscillatable brake applying member and hand-operable from the platform to effect the application of the brakes on the chassis.

9. In a shock absorbing car comprising a chassis and a relatively longitudinally movable superstructure, said superstructure having a recess at one end, a hand wheel brake applying mechanism mounted in said recess independent of any connection with the chassis, and means connected with said hand wheel brake applying mechanism having a portion extending longitudinally of the superstructure and a portion projecting downwardly therefrom, said means being operatively connected with the brake mechanism of the chassis.

10. In a car having a chassis equipped with a braking means and a superstructure mounted on the chassis for shock-reducing movement relative thereto, an auxiliary brake-applying mechanism comprising a hand-operable motion-reduction unit mounted on said superstructure and moving therewith relative to the chassis, and means flexibly connecting the reduction unit on said superstructure with the braking means on said chassis and having portions displaceable respectively with the chassis and with the superstructure on relative movement of the chassis and. superstructure to maintain a substantially unaffected braking connection.

11. In a car having a chassis equipped with a braking means and a superstructure mounted on the chassis for shock reducing movement relative thereto, an auxiliary brake-applying mechanism comprising a hand-operable motion-reduction unit mounted on said superstructure and moving therewith relative to the chassis, and means forming a compensating brake connection between the reduction unit on said superstructure and the braking means on said chassis and permitting the said relative movement of the chassis and superstructure.

12. In a car having a chassis equipped with a braking means and a superstructure mounted on the chassis for relative longitudinal shock-relief displacement, brake-applying means hand-operable from said superstructure and having portions relatively displaceable respectively in unison with the chassis and with the superstructure, and means acting to variably space said superstructure and chassisin proportion to the relative longitudinal displacement thereof to compensate for the relative displacement of the said respective portions of said brake-applying means.

13. The combination set forth in claim 12 in which the means for variably spacing the superstructure and chassis comprises cam means interposed therebetween and acting on the relative longitudinal displacement of the superstructure and chassis to effect the desired compensating displacement.

WILLIAM PLATTS KELLE'I'I. 

